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Brake pad warning coming on with headlights?

TurboGriffin Nov 29, 2018

  1. TurboGriffin

    TurboGriffin New Member

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    I feel a wee bit of background info may (or may not) be helpful with this issue so bare with me... I'll also try to explain as clearly as I can, but feel free to ask any questions.

    So...The car has an issue with the brake pad wear sensor connector/wires, so the warning light comes on randomly, then it fixes itself for a while. Its been doing this since about July/August when the front pads were changed. And yes, there's still plenty meat left on them.
    The flasher relay has started to be a bit dodgy in the past week. They usually work not too bad, but sometimes they stop, sometimes they flash erratically, as I'm sure a lot of you will know.
    I tend to leave the car to warm up for 5 - 10 mins in the morning and before leaving work WITHOUT the headlights switched on. The dash shows the OK after the ignition is switched on and no warning lights after start up either.

    Now here's the issue... After getting in the car (keeping in mind that it has already been sat running for 10 mins without any warning lights), I switch on the headlights and up pops the brake pad warning light. Sometimes it doesn't do it, but more often than not it does. Started doing it on Monday and wondered if it could possibly be connected to the dodgy indicator relay in some obscure way?

    Any help or suggestions would be greatly appreciated :thumbs up:
     
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  3. TurboGriffin

    TurboGriffin New Member

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    I'm starting to think I'm on my own with this one... :shrug:

    Posted on two Facebook groups and here, and not one idea or suggestion?
    It's not affecting the car in any way, it's just something I rather it didn't do lol.
    Only thing I can think is to try fix the pad wear sensor and see what it does. It's just very strange how it's coming on when I switch on the headlights.
     
  4. Stuart B

    Stuart B Well-Known Member

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    you can simply put a paper clip between the wires on brake pad connector.

    This might be a bad earth, dodgy cluster etc - people cant help if they have never had this issue? I have been on this forum for 3 or 4 years and never seen one like it before. but best to try and fix the known issues (even if this isn't actually discovering the cause of this unusual behaviour)

    maybe the cluster bulbs are different when the car lights are not switched on and the daylight warning bulb doesn't work so the brake warning is supposed to be showing all the time but only works when the head lights are on? <--- Just Guessing which is what everyone has avoided doing :|
     
    Last edited: Nov 30, 2018
  5. TurboGriffin

    TurboGriffin New Member

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    I realised it was a case of no one else has had the problem when I wasn't getting any replies. Trust me to have the car that's got a unique problem :tearsofjoy:

    I don't mind people guessing, cos it's pretty much what I'm doing. It's a case of any suggestion (or guess) is welcome at this point lol.

    The pad warning does come on randomly without the headlights being on, so I don't think it's that.
    Will have a poke about it this weekend. May even be something simple like a dodgy battery causing some dodgy signals.

    Thanks for the suggestions :thumbs up:
     
  6. TurboGriffin

    TurboGriffin New Member

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    Well, it seems to have fixed itself :tearsofjoy:
    Still need to fix the issues, but the pad warning has stopped coming on with the headlights... For now at least.. .
     
  7. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    I run pads without a sensor so have used an old pad sensor plug and twisted the wires together to stop the dash from lighting up... its 'insulated' but on occasion when the nearside front wheel has been subjected to a 'defect' in our glorious roads the jolt will pop the light up...

    I suspect its where the wire has got a little corroded over the years and the jolt breaks the connection enough to worry it..

    I keep meaning to just cut the plugs off, solder it and seal it forever... just never got around to it :)

    <tuffty/>
     
    Sandra likes this.

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